feat: Update standup guidelines for clarity and audience accessibility

prompts/standup.md

@@ -23,6 +23,8 @@ Requirements:
 - Prefer evidence-backed statements over assumptions
 - Write in natural US English that can be forwarded externally without rewriting
 - Write the standup as David's external progress report
+- For standups that will also be sent to Teams, prefer plain outcome language over internal implementation jargon; avoid terms like `fallback` unless they are explained well enough for a broader audience
+- If a release or propagation step is waiting on approvals or pipeline work, make the parallel work explicit instead of sounding like the day is blocked on waiting alone
 - Do not mention Jeff by name
 - Do not mention Mattermost because it is internal-only communication
 - Use bullet points for each item